.mask {
    z-index: 100;
    position: absolute;
    top: 0px;
    filter: alpha(opacity=60);
    background-color: #777;
    left: 0px;
    opacity: 0.9;
    -moz-opacity: 0.9;
}
.edit-area {
    width: 640px;
    height: 320px;
    background-color: #fff;
}
.edit-box {
    width: 640px;
    height: 360px;
    background-color: #fff;
}
